<template>
    <div id="tab">
        <el-tabs
            v-if="$route.meta.isTab"
            v-model="mainTabsActiveName"
            :closable="true"
            @tab-click="selectedTabHandle"
            @tab-remove="removeTabHandle"
        >
            <el-dropdown class="site-tabs__tools" :show-timeout="0">
                <i class="el-icon-arrow-down el-icon--right"></i>
                <el-dropdown-menu slot="dropdown">
                    <el-dropdown-item @click.native="tabsCloseCurrentHandle">关闭当前标签页</el-dropdown-item>
                    <el-dropdown-item @click.native="tabsCloseOtherHandle">关闭其它标签页</el-dropdown-item>
                    <el-dropdown-item @click.native="tabsCloseAllHandle">关闭全部标签页</el-dropdown-item>
                    <el-dropdown-item @click.native="refresh()">刷新当前标签页</el-dropdown-item>
                </el-dropdown-menu>
            </el-dropdown>
            <el-tab-pane
                v-for="item in mainTabs"
                :key="item.name"
                :label="item.title"
                :name="item.name"
            >
                <el-card :body-style="siteContentViewHeight">
                    <iframe
                        v-if="item.type === 'iframe'"
                        :src="item.iframeUrl"
                        width="100%"
                        height="100%"
                        frameborder="0"
                        scrolling="yes"
                    ></iframe>
                    <keep-alive v-else>
                        <router-view v-if="item.name === mainTabsActiveName" />
                    </keep-alive>
                </el-card>
            </el-tab-pane>
        </el-tabs>
        <!-- 主入口标签页 e -->
        <el-card v-else :body-style="siteContentViewHeight">
            <keep-alive>
              <router-view />
            </keep-alive>
        </el-card>
    </div>
</template>

<script>
import { isURL } from '@/utils/validate'
export default {
    name: "mainTab",
    inject: ["refresh"],
    computed: {
        mainTabsActiveName: {
            get() {
                return this.$store.state.common.mainTabsActiveName;
            },
            set(val) {
                this.$store.commit("common/updateMainTabsActiveName", val);
            },
        },
        menuActiveName: {
            get () { return this.$store.state.common.menuActiveName },
            set (val) { this.$store.commit('common/updateMenuActiveName', val) }
        },
        mainTabs: {
            get () { return this.$store.state.common.mainTabs },
            set (val) { this.$store.commit('common/updateMainTabs', val) }
        },
        documentClientHeight: {
            get () { return this.$store.state.common.documentClientHeight }
        },
        siteContentViewHeight () {
            var height = this.documentClientHeight - 50 - 30 - 2
            if (this.$route.meta.isTab) {
            height -= 40
            return isURL(this.$route.meta.iframeUrl) ? { height: height + 'px' } : { minHeight: height + 'px' }
            }
            return { minHeight: height + 'px' }
        }
    },
    methods:{
        // tabs, 选中tab
      selectedTabHandle (tab) {
        tab = this.mainTabs.filter(item => item.name === tab.name)
        if (tab.length >= 1) {
          this.$router.push({ name: tab[0].name, query: tab[0].query, params: tab[0].params })
        }
      },
      // tabs, 删除tab
      removeTabHandle (tabName) {
        this.mainTabs = this.mainTabs.filter(item => item.name !== tabName)
        if (this.mainTabs.length >= 1) {
          // 当前选中tab被删除
          if (tabName === this.mainTabsActiveName) {
            var tab = this.mainTabs[this.mainTabs.length - 1]
            this.$router.push({ name: tab.name, query: tab.query, params: tab.params }, () => {
              this.mainTabsActiveName = this.$route.name
            })
          }
        } else {
          this.menuActiveName = ''
          this.$router.push({ name: 'welcome' })
        }
      },
      // tabs, 关闭当前
      tabsCloseCurrentHandle () {
        this.removeTabHandle(this.mainTabsActiveName)
      },
      // tabs, 关闭其它
      tabsCloseOtherHandle () {
        this.mainTabs = this.mainTabs.filter(item => item.name === this.mainTabsActiveName)
      },
      // tabs, 关闭全部
      tabsCloseAllHandle () {
        this.mainTabs = []
        this.menuActiveName = ''
        this.$router.push({ name: 'welcome' })
      },
      // tabs, 刷新当前
      tabsRefreshCurrentHandle () {
        var tab = this.$router
        this.removeTabHandle(tab.name)
        this.$nextTick(() => {
          this.$router.push({ name: tab.name, query: tab.query, params: tab.params })
        })
      }
    }
};
</script>

<style scoped lang="scss">
.el-dropdown{
    display: flex;
    justify-content: center;
    align-items: center;
    right: 0px;
    top: 60px;
    position: fixed;
    height: 40px;
    width: 40px;
    z-index: 999;
    cursor: pointer;
    line-height: 40px;
    font-size: 16px;
    background-color: rgb(235, 232, 232);
    &>.el-dropdown-selfdefine{
      display: flex;
      flex: 1;
      height: 100%;
      justify-content: center;
      align-items: center;
      margin: 0;
    }
}
</style>